Sight for firearms.



1. W'INDRIDGE.

SIGHT roa FIREARMS APPLICATION FILED MAR- 31,1913.

Patented May 11, 1915.

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UNITED STATES PATENT OFFICE.

JAMES WINIDRIDGE, OF MIDDLEFIELD, CONNECTICUT, ASSIGNOR TO THE LYMAN GUN SIGHT CORPORATION, OF MIDDLEFIELD, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

SIGHT FOR FIREARMS.

Application filed March 31, 1913.

To all whom it may concern:

Be it known that I, J AMES WVINDRIDGE, of Middlefield, in the county of Middlesex and in the State of Connecticut, have invented a certain new and useful Improvement in Sights for Firearms, and do hereby declare that the following is a full, clear, and exact description thereof.

My invention has for its object to provide a rear wind-gage sight in which the sight aperture shall be adapted to transverse adjustment with relation to the sight post or stem instead of that form in which the sight and stem are together movable transversely of the base.

The invention consists in the novel combination, construction and arrangement of parts as hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification-Figure 1 is a side elevation of a sight embodying my improvements; Fig. 2 is a front elevation of the sight and stem detached from the base; Fig. 3 is a rear elevation; Fig. 4 is a plan view of the same; Fig. 5 is a front elevation of the stem and sight carrying head with the sight disk removed therefrom; Fig. 6 is a central vertical longitudinal section through the sight carrying head; Fig. 7 is a vertical cross section in the plane of the axis of the adjusting screw; Fig. 8 is a side elevation of the sight carrying head; Fig. 9 is a side elevation of the sight slide.

Referring to the drawings a complete sight is shown in side elevation in Fig. 1, but the remaining figures show the sight stem and sight disk detached from the base, as the improvements relate solely to the disk and sight stem and are applicable to bases of various designs. The base A here shown is of a class adapted for being secured to the tang or stock of the firearm, and the sight post B is mounted in a part D called the joint, which is hinged to the base by a suitable pivot E. The sight post is provided with a rack F which by engagement with a suitable adjusting nut G journaled on the joint is adapted to be elevated to adjust the sight aperture for height. These features of the sight are all old and well known and here require neither to be further shown or described.

The devices comprising my invention are described as follows: The upper part of Specification of Letters Patent.

Patented May 11, 1915.

Serial No. 758,079.

the sight stem B comprises a head 1 having a vertical flat rear surface it, provided with a horizontal, transverse flange 2 at its lower edge, the upper surface of which extends in an acute angle with the vertical surface of the head. The upper edge L- of the head is horizontal and forms a right angle with the surface it, while centrally of its length a tongue 4 projects rearwardly, having its lower surface parallel with the upper surface of the flange 2. In the guideway thus formed by the said parallel surfaces and the vertical side of the head, is received a slide 3 horizontally movable therein, and provided with a pair of forwardly projecting ears 7 at its ends reversed in relation to the tongue 4, overhanging and engaging the flat upper edge 70 of the head. Through these cars is j ournaled a horizontal adjusting screw 8 having the portion between the ears screw threaded and screwed through a threaded bearing 2' in the tongue 4. The screw is held in its place in its bearings by means of a hub 10 at one end forming part of a knurled adjusting head 11, and a nut collar 6 screwed upon its opposite end. Said parts both thrust upon the respectiveears of the slide, but through the washer like ends 13 of a spring metal. plate 14 extended across and let into the upper surfaces of the ears and the tongue with the ends bent down on the outer sides of the ears and perforated to receive the adjusting screw, as shown in Fig. 7 The projections 15 formed by sinking the spring into the ears and tongue secure the spring positively therein and holds the slide secure in its guideway, the spring in fact comprising a way on which the tongue 4 travels, as shown particularly in Figs. 4 and 6. The ends of the spring are normally left somewhat open or farther apart than the adjacent surfaces of the ears, whereby the nut collar 6 will compress them slightly as it is screwed to place and thus cause the plate to impose sufficient friction on the screw to prevent its accidental displacement in its bearings.

The bearing of the screw in the tongue of the head is made slightly lower than those of the ears of the slide, and the slight strain thus imposed downward upon the slide serves to force the slide downward upon the dovetailed flange 2 of the head in intimate bearing contact therewith and without play between the surfaces.

The lower edge of the slide will be held in position and guided in the guideway by its engagement with the dovetailed flange and the flat surface of the head, and the upper part will be held in place by the adjusting screw 8 passing through the tongue of the head, guided also by the engagement of the slide and vertical surface of the head, and the bearing of the ears 7 upon the upper flat surface of the head. The slide has a perforation 16 centrally in the plane of the slot 5 through the head and a part of such perforation is screw threaded to receive the correspondingly threaded central portion or boss 17 of the sight disk 18. The sight disk has a central perforation or peep sight aperture 20 through which aim is to be taken in sighting, and which is in registration with the openings 16 and 5 of the slide and sight head.

In operation, the rotation of the screw by its axial advance through the tongue 4, and being held from endwise movement in the ears of the slide will move the slide bodily horizontally transversely of the head 1, carrying the sight disk therewith. In this movement the sight aperture 20 of the disk traverses the field of the slot 5 to either side of the axis of the sight stem, which is vertically over the axis of the gun barrel, thus providing lateral adjustment of the sight aperture for wind gage. The upper surface of the spring plate 14: is graduated to indicate the amount of Wind gage movement with reference to a centralizing mark 19 on the tongue of the head, shown in Fig. 4.

While it is obvious that the screw may be journaled in the tongue of the head, and in threaded engagement with the ears of the slide, the arrangement shown is preferable, in that the head of the adjusting screw is always kept in the same relation to the disk, and the construction is more compact.

An important feature of the construction is that disks of various sizes and diiferent apertures may be employed in connection with the sight head simply by unscrewing one and substituting another. In assembling the parts the slide is entered between the parallel surfaces of the tongue 4 and flange 2 until it engages the flat rear surface of the head and the ears 7 contact with the upper edge of the head.

It will be seen that the upper horizontal surface 76 of the head, and the vertical rear surface i thereof comprise an external angle or V, upon which the slide 3, comprising in the lower surface of its ears 7 and the forward vertical surface of its body a reentrant angle or reversed V, fits, held on such V shaped guide-way by the adjusting screw 8 passed through the ears and the tongue 1 of the slide. While the lower edge of the slide bears upon the dovetailed surface of the flange 2, it will be perceived, that, as said surface is very nearly concentric with the center of the adjusting screw, that is, the straight plane comprising its surface is but a slight departure from an arc struck from said center, therefore, the dovetail is of very little use for preventing the swing of the slide out of the guide-way around the axis of the adjusting screw as a center. This function is performed by the engagement of the ears of the slide with the flat top surface of the stem, which effectually prevents the swing of the ears downward, and by the engagement of the vertical body of the slide with the vertical surface of the sight head, which completely prevents the swing of the slide around said axis in the opposite direction. As the latter of these surfaces is substantially radial to the said center and the former is nearly so, they hold against the swinging action of the slide in the most effective manner. It will be noted, however, that the sight head is not made of sufficient width to engage the ears of the slide throughout the entire movement thereof. When in the extreme movement of the slide in either direction either one of the ears is carried by, and off from, its seat, then the dovetailed surface of the flange 2 is of importance in preventing tipping of the slide downward at that end which has been run off from the surface. Were the surface of the head made sufliciently long to prevent the ears from running off from it the dovetailed flange would not be required. It is preferable, however, to employ the dovetailed flange instead of the extra width of the head to avoid clumsiness of proportion and weight. It also strengthens the union of the sight stem and head.

This application is a substitute for abandoned application No. 620,575, filed April 12, 1911.

Having thus described my invention what I claim is 1. In a sight for firearms, the combination of a head having a guideway formed of intersecting transverse surfaces forming an acute angle, a sight carrying slide having similar surfaces engaging those of the guideway, projections on the head and the slide lapping past each other, an adjusting screw passing through said projections, and a plate extending over the projections and provided with spring ears through which said screw passes.

2. In sights for firearms the combination of a base, a sight stem mounted thereon having a head perforated in the direction of sighting, and a transverse guideway, a slide guided in the way having a screw threaded perforation in registration with the perforation of the head, a sight screwed therein, ears integrally formed upon the head and slide, an adjusting screw engaging the ears to move the slide in the head laterally for an. assessment mammaaair wind gage adjustment, and a spring for imposing friction upon the adjusting screw to prevent its accidental displacement in its bearings.

3. In a sight for firearms the combination of a base, a sight stem mounted in the base, adjustable as to height, provided with a head perforated in the direction of sighting having a transverse flange at its lower edge and a tongue on its upper edge overhanging the flange, a slide guided on said flange of the head provided with ears corresponding to the tongue of the head overhanging and engaging the upper edge of the head, an adjusting screw j ournaled in said ears having its intermediate threaded portion in threaded engagement with the tongue of the head, thrust collars on the ends of the screw adjacent the ears, a spring plate spanning the ears having downwardly bent ends between the screw collars and ears perforated to receive the screw and proportioned to exert tension endwise upon the screw collars to hold the screw frictionally against displacement, the spring plate graduated on its upper surface with reference to an indicator mark on the tongue of the head, the slide being perforated and screw-threaded to receive a sight disk substantially as and for the purpose specified.

4. In a sight for firearms, the combination of a head having a vertical rear face and an upper horizontal guiding edge and provided with a lower flange having its upper surface comprising an acute angle with the said ver- 7 tical face, and a tongue projecting over the rear face having its lower surface parallel with that of the flange, a slide adapted to engage the vertical face of the head, with its upper and lower edges bearing on the surface of the tongue and flange, and provided with ears bearing upon the upper edge of the head, and a screw passing through the ears and tongue in screw threaded engagement with one of the said elements and held against longitudinal movement relatively to its other.

5. In a sight for firearms, the combination of a head having a vertical rear face and an upper horizontal guiding edge and provided with a lower flange having its upper surface comprising an acute angle with the said vertical face, and a tongue projecting over the rear face having its lower surface parallel with that of the flange, a slide adapted to engage the vertical face of the head, with its upper and lower edges bearing on the surface of the tongue and flange, and provided with ears bearing upon the upper edge of the head, a screw passing through the ears and tongue in screw threaded engagement with one of the said elements and held against longitudinal movement relatively to the other, and a spring bar surmounting and let into the tongue and ears, and forming a guide-Way to hold the movable part in place.

6. In a sight for firearms, the combination of a head having a vertical rear face and an upper horizontal guiding edge and provided with a guiding flange at the lower edge of the rear face, and a tongue projecting over the rear face comprising a guiding way with the flange, a slide adapted to engage the vertical face of the head with its upper and lower edges bearing on the surface of the tongue and flange, and provided with ears bearing upon the upper edge of the head, a screw passing through the ears and tongue in a plane intermediate of the upper and rear faces of the head in screw threaded engagement with one of the said elements and held against longitudinal movement relatively to the other, and a spring bar surmounting and let into the tongue and ears and having its ends bent down and perforated to receive the screw to hold the bar in place, the bar forming a guideway for the movable slide.

In testimony that I claim the foregoing I have hereunto set my hand.

JAMES WINDRIDGE.

Witnesses:

IsADnLL L. Coon, DAVID GRANT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Fatents,

Washington, D. G. 

